72 duster firewall wiring questions ???

So, upon some more electrical exploration. Turn signals will not flash, maybe only one click of the flasher pot when going from left to right switch position, sounds like it's somewhere up under the dash on the passenger side...? Lights are working just staying on solid. Wondering if maybe the previous owner put the wrong bulbs in?? Hazards will flash though... Horn currently does not work - horn will sound if I put 12 volts to it directly. More time with the fluke and searching wiring diagrams. I also noticed I am missing the clip / plastic bushing that connects the wiper arms together up under the dash on the drivers side...